Electric heater.



PATBNTED MAY 26, 1908.

2 SHEETS-SHEET 1.

N0. 889,040. PATENTE-1D MAY 26, 1908. E. F. PORTER.

BLEGTRI HEATER. APPLICATION FILED JAN. ze, 190s.

z SHEETS-SHEET z.

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iflT-QD Eil FATF-NT FFTCE.

EDWIN F. PORTER, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO BENJAMIN PEACH,

TRUSTEE, GF' LYh l, MASSACHUSETTS. f

ELEC-TRS HEATER.

i Specification of lLetters Patent.

Patented Mey 2e, reos.

Application filed January 29, 196e. Serial No'. 298,347.

To all whom it mag/concern: n

Be it known that LPT-@WIN F, Fon'rnn, of Dorchester, Boston, in the county. ol Suffolk and State or lilussachusetts, have invented cert-ein new and useful improvements in Electric Heaters, ol' iifhich the iollov-.ring is speciiica-tion. n

lvlyinvention rela-tes to improvements in electric heaters especially to such heaters es ere used in electriccars.

The object ci my invention is to obtain e thorough and perfect diffusion of heet throughout the entire ered of the cer.

A further object is to effect the ventilation oi' the csr by taking in fresh uiixlrom out or doors over the heet generating resistenoes.

Another object is to properly suspend the resistance wires in the heater. ln this construction o considerable saving of current is reztlizedend greater mechanical :ind electrical eiiiciency as Well as permanency ol'A construetion are insured.

in the accompanying drawings which illustrete a construction embodying my invention, Figure 1 is e perspective view of sv seat in an electric csr showing the heater running the full length of the heel-board et its lower edge. Fig. 2 is c. transverse section oi' the Seat and heater showing the manner in which fresh air isteken in through en opening in the floor. Fig. 3 is o section ol the heater proper illustrating the method olz suspending .the heater coil. Fig. e is a. hoch view showing lthe same construction. Fig. 5 is e trimsverse section through one of the supporting posts which suspend the coil. Fig. 6 is e modification Vof tho construction shown in the cross section Fig. 2, the difference being the location of the fresheeir iii-telle. Fig. 7 is e perspective view of' the entire seat of the car showingthe floor in section for the purpose of displaying two fresh air in-teles supplemented by L-shsped pipe. Fig. 8 is e transverse section pertly through lone of the pipes shown in Fig.` 7 and showing more clearly the air circulation. Fig. 9 is e representation of'one of the iii-take pipes showing the manner in which it is closed with e valve, the valve Vbeing shown open. Fig. 10 shows the assembling oi the hoster, the resistance coils being mode in sections and insulated one Section from the other on :in insulating support.

'of the heater hinged et lvl.

work ior admitting worin air unto the cer.

Lilie letters of reference refer to like ports throughout the several views. ln Fig. 1, A is the cer seat having a heel hoard B at the lower port of which is located the hesiter casing C mede in sections D, E, F, G, ii, l., J and K. These sections are hinged to the heel board at their upper edge, just be- 60 low which is grille work L for the purpose oi allowing wurm sir to enter the cer. In the iront of the heater are dempers C for the purpose of regulating the liow of air from the cnr into the heater. open in the sections D, F and l and closed in the remaining sections.

ln 'the cross section, Fig. 2, C is the casing L is the grille Pris the hea-ter coil supported by the posts Q (Fig. 3) which inturn are supported by the hor l?. from which they src insulated hy the insulotingwsshers S and S and the insulating bushing T which fills the hole U. This hole is ccuntersunk ut V and o (Fig. 5).

The ber it (Fig. 4) is provided with en arm ill( for the purpose o1" attaching it to the heel boord B and between the erm and the vheel hoard is e sheet ol" asbestos peper X as shown so in Fig. 2.

As shown in Fig. 5, the resistance coil P enters the slot Y in the post Q which slot is f adopted to he pinched together or riveted over for the purpose of holding the coil in S5 the purpose of accelerating the circu ation of eirthrough the hole A2 Fig. 6.

in Fig. S, the L-shaped pipe B2 is shown per` tly in section and in Fig. 9, D is e vel-ve for closing the holo A2.

lines Fig. 7 :i similar valve B3 for the pipe B is shown open in Fig. 7 with the car traveling in the direction indicated by the arrow O.

' The opere-tion is iollovvs: The heet is diiluscd throughout the entire length of the cer by means of the heating vcoil which These dempers are shown G5 This valve is shown openvin Fig. 9' end is shown closed in dotted 10o 'ing of the valve D preventingtaking the air A each other on the insulating wall F..

` bodying the saine, what I claim as new and other. If it is desi-red to take in some of the common in the construction of electric heatextends throu hout;v fresh air coming in I through the ho es A in the floor of the car passes over the heating coils P and out through the 'grille work L into the car thereby Giving perfect ventilation as wellas the same degree of heat from one end of the car to the heated air from the car, the dampers C may be opened, the heater then drawing part of its air from inside the car and reheating it while supplying partly fresh air through the holes in t e bottom of the car. It will be seen that by proper use of these dampers, the heating and ventilation may be modified and regulated at the will of theoperator.

Ihe casing of the heater being made in sections is a convenience in manufacture and being hinged makes access to the heater 4convenient. y y

The holes in the bottom of the car may be placed` directly under the heater as shown at A in Fig. 2, or more remote under the seat, as shown at A2Fig. 6, in which latter case the slotA3 is provided for conveyinf fresh air to the heater. For the purpose o accelerating the circulation of air through holes in the bottom of the car, the L-shaped tubes B and BZ are provided, having valves B3 and D which close over the holes in the bottom of the car. This opening of the valve B3 and closing of the valve D is due to the car moving in the direction of the arrow O', the closout again which enters at B due to the motion of the car as Well as to the convection of the heater coiljthe operation would be reversed if the car were traveling in the oppo-` site direction.

In Fig. 10, PQI2 and I3 represent three sections of the heater coil insulated from Attention is called to the manner in which the heat resistance coil is' suspended; it is ers to wind the coil on an insulating support or to suspend it on 'an insulating bar thereby in both cases interfering with the circulation of air through the heater, causing overheat ing and frequently actual burning out. In my construction, it will be seen that the heater is strongly sup orted by metallic posts which are insulated) by mica washer-s S and`S on a strong metallic bar R,the heating coil being freely suspended in the air Without contact other than with the metallic osts Q. This construction ,allows the air to reely circulate around everypart of the heating coil reducing a uniform tempera-- ture cooling t e -coil to a safe degree of heat in every part, thereby making the heater op-l erative, strong and durable.

Having thus described the nature of my invention and set forth a construction emto support said hanger, and means for insu- A lating said hanger from said support.

2. In an apparatus of the character dei I scribed, one or more heat generating electric conductors forming an electric heater, yone or more studs or hangers each adaptedto engage or grip one or more coils of each of said conductors, a separate insulated support adapted to support the studs or hangers engaglng each conductor, and means for insulating said hangers from said supports.

3. In a vehicle, a seat, a heel board for said seat', an electric heater located at the lower part of said heel board and outside of same, a casingeovering said heater, grille Work at the top of said casing, openings in the bottom of said casing to admit air thereto from said vehicle, and ducts from the floor of said vehicle to admit outside.' air to said heater'.

4. In a vehicle, a seat, a heel board for said seat, an electric heater located at the lower part of said heel board and outside of same, a casing covering said heater, grille work at the top of said casing, openings said casing to admit air thereto from said vehicle, ducts from the lioor of said vehicle to admit outside air to said heater, and means for controlling the passage of air through said openings.

5. In a vehicle, a seat, a heel board to said seat, an electric heater in combination with said heel board, and means for admitting air to the back of said heater and for venting the heat from the front of said heater.

6. In an apparatus o'f the character described, one or more heat generating conductors forming an electric heater and extending the length of the car', a series of supports for suspending said heater and insulated from each other, and means for connecting said heater and said supports and insulated from said supports.

7. In an apparatus of the character described, one or more heat generating conductors forming an electric-heater and extending the length of the car, one or more supports for suspending said heater, and means for connecting said heater.- and said support or supports and insulated from said support or supports.

8. In an apparatus of the character described, one or more heat generating conductors forming an electric heater, means for supporting and insulating said heaterhand a casing covering said heater and made in sec tiens to allow access thereto.

9.- In an apparatus of the character described, one or more heat generating ,conduc two subscribing Witnesses,` this 25th day of tors forming 4an electric heater, means for January, A. D. 1906;

supporting Aand insulating said heater, and a f casing covering said heater and made in p iv- EDWN 'F' PORTER' 5 otedsections to allow access thereto. Witnesses:

.In testimony whereof, I. haveslgned my AQ L. MESSER, name to this speo'cation in thel presence of EQL. HARLOW. 

